Elena N. Bodnar, Raphael C. Lee, and Sandra Marijan of Chicago, Illinois, USA, for inventing a brassiere that, in an emergency, can be quickly converted into a pair of protective face masks, one for the brassiere wearer and one to be given to some needy bystander.

Reference

U.S. patent # 7255627, granted August 14, 2007 for a “Garment Device Convertible to One or More Facemasks.”